Two-direction carry mechanism for an amount accumulator

ABSTRACT

In a calculating machine, an amount accumulator having a single set of accumulator wheels is provided with reversible bias means responsive to the add or subtract nature of an accumulating operation. This reversible bias means is effective for producing tens transfers in either an add or subtract direction according to the direction of bias established prior to an initial carry stage thereof, such initial carry stage being followed by a completed carry in which adjacent higher order accumulator wheels are rotated by said bias means in a direction consistent with the predetermined direction of rotation of the accumulator wheels during add or subtract operations.

United States Patent Donald R. Crain;

Edward R. Huber, Livonia, Mich. 815,523

Apr. 9, 1969 Mar. 16, 1971 Burroughs Corporation Detroit, Mich.

inventors Appl. No. Filed Patented Assignee TWO-DIRECTION CARRY MECHANISM FOR AN 11/1940 Butler Primary Examiner-Stephen J. Tomsky Attorneys-Kenneth L. Miller and Frank H. Cullen ABSTRACT: In a calculating machine, an amount accumulator having a single set of accumulator wheels is provided with reversible bias means responsive to the add or subtract nature of an accumulating operation. This reversible bias means is effective for producing tens transfers in either an add or subtract direction according to the direction of bias established prior to an initial carry stage thereof, such initial carry stage being followed by a completed carry in which adjacent higher order accumulator wheels are rotated by said bias means in a direction consistent with the predetermined direction of rotation of the accumulator wheels during add or subtract operations.

PATENTED IIAR I 6 ml SHEET 1 OF 6 FIG. I.

INVENTORS. DONALD R. CRA/N BYED WARD R. HuBER'.

AGENT PATENTED "AR 1 6197i SHEET 2 0F 6 FI6.3. A

PATENTED MRI 6 Ian SHEET 3 OF 6 PATENTEDHAR] 61971 3570760 saw 5 UF 6 FIG TWO-DIRECTION CARRY MECHANISM FOR AN AMGUN'I ACCIJMULATGIR BACKGROUND OF THE INVENTION the former wheel is exceeded. Most of these devices provide a plurality of carry racks or sectors which are spring biased in a single direction and which are releaseably activated to rotate the higher order wheels with which they cooperate in a single predetermined direction. Such devices are commonly associated with accumulators of intermeshed double-wheel construction and are selectively operable to advance either set of wheels in the predetermined direction, one set being rotated in such direction to produce add carries and the opposite set being rotated in the same direction to produce subtract carries.

Several known devices are effective for producing both add and subtract carries in conjunction with an accumulator comprised of a single set of accumulating wheels, such devices providing carry sectors which are selectively biased in either of two directions depending upon the nature of the accumulating operation that is being performed. The reversible bias requirement of these devices has generally been accommodated by pivotally rotating a plurality of coil springs as between two definitive positions, one position being effective for biasing the carry sectors in an add direction and the other being effective for biasing the sectors in a subtract direction, the coil springs in such devices being connected to the carry sectors and to a repositionable bail or shaft. The repetitious repositioning of such bails or shafts, and the coil springs connected thereto, has generally proven unsatisfactory due to the tendency of the springs to become dislodged from the bail or shaft, and the tendency of the eyelets of the springs to wear.

SUMMARY OF THE INVENTION It is accordingly an object of the present invention to provide a tens transfer device which contains reversible means for biasing the carry sectors thereof, the reversible bias being accomplished in such manner as to avoid the disadvantages of repositionable coil springs.

An important aspect of the invention is the use of reversible bias means in association with the ordinally arranged gear wheels of an amount accumulator, such means consisting of a plurality of generally U-shaped springs, the terminal extremities of the springs being selectively positionable by means of a movable shaft to bias corresponding rotatable carry sectors in either an add or subtract direction. Each of the reversibly biased carry sectors is drivingly associated with a gear wheel of corresponding order, and blockably associated with a pair of carry latches which in turn are associated with a carry pawl that is activatably responsive to an adjacent lower-order gear wheel. The activation of a given carry pawl, in cooperation with its associated carry latches, is accordingly effective to release the carry sector that is associated with the adjacent higher-order gear wheel to the control of the selected bias of its associated U-shaped spring.

BRIEF DESCRIPTION OF THE DRAWINGS Other objects, aspects and advantages of the invention will be more clearly understood from the following description when read in conjunction with the accompanying drawings, in which:

FIG. I is a fragmentary sectional elevation of an accumulator comprising the preferred embodiment of the invention, such elevation revealing a carry pawl, a pair of carry latches, and a reversibly biased carry sector in relationship with an accumulator gear wheel, such elements being shown in their normal home positions;

FIG. 2 is a sectional elevation showing the elements of FIG. I in an initial carry stage, the carry sector being selectively biased in an add carry direction;

FIG. 3 is a sectional elevation showing the elements of FIG. I in a full carried stage, the add direction bias of the U-shaped spring having been applied to the carry sector;

FIG. 4 is a sectional elevation showing the elements of FIG. I in an initial carry stage, and with the carry sector biased in a subtract carry direction;

FIG. 5 is a sectional elevation showing the elements of FIG. 1 in a full carried stage, the subtract direction bias of the U- shaped spring having been applied to the carry sector;

FIG. s is a fragmentary perspective view of an accumulator assembly taken from the left front corner and wherein a plurality of carry pawls and carry sectors are shown in an assembled state and in relationship with a gear wheel rocker assembly; I

FIG. 7 is a fragmentary front view of an accumulator assembly showing the carry pawls and carry sectors in relationship to the gear wheels;

FIG. 8 is a fragmentary top plan view of the accumulator assembly showing the carry pawls and carry latches in assembled relationship with the gear wheels;

FIG. 9 is a fragmentary left side elevation of an accumulator assembly showing some of the details of the gear wheel-engaging means, and showing the carry pawl and carry sectorrestoring means;

FIG. It is a fragmentary left side elevation showing some of the elements of FIG. 9 with the frame member cut away to disclose the details thereof; and

FIG. II is a fragmentary perspective view taken from the right rear corner showing various details of the latch-positioning means and the spring-positioning means.

DETAILED DESCRIPTION OF THE INVENTION The invention is shown and described in conjunction with an accumulator having a plurality of gear wheels 25 rotatably supported by a shaft 27, the latter shaft being fixed to a left and right frame member 29 and 311 of a gear wheel rocker assembly as shown in FIG. 6. This gear wheel rocker assembly is comprised of the frame members 29 and 3i, the shaft 27, and a rocker shaft 32 which is journaled within a pair of frame members 21 and 23 of an accumulator section that may be incorporated in a calculating machine. When arranged in such machine, the gear wheels 25 are positioned in cooperable relationship with a plurality of actuating sectors 24 as indicated in FIGS. I through 5. A pair of cams 33 and 35 (FIGS. 10 and II) are fixed to a driven shaft 39 which is also journaled within the frame members 21 and 23, the camming surfaces of these cams being disposed in cooperating relationship with a pair of rollers 37 rotatably supported on the shaft 27. The driven shaft 39 is responsive rotatably to the main drive shaft of the calculating machine to activate the gear wheels 25 into and out of engagement with the actuating sectors 2 such engagement occurring prior to the lowering return movement of the actuating sectors during an add operation, and prior to the upward advancing movement of these sectors during subtract operations. As shown in FIGS. 9 and It], the engagement of the gear wheels 25 with the sectors 24 is accomplished by the clockwise rotation of the driven shaft 39 and the cams 33 and 35, the disengagement of the gear wheels from the actuating sectors being accomplished by a pair of springs 41 connected to a pair of studs 43, as the cams 33 and 35 are rotated in a counterclockwise direction.

A plurality of carry pawls 45 (FIGS. I through 6) are slideably and rockably supported in a plurality of longitudinal slots formed in a guide comb 47 which is fixed to the frame members 29 and 31 of the gear wheel rocker assembly, and are rotatable therewith as the gear wheels are rockably engaged with and disengaged from the actuating sectors. Each of the carry pawls 45 is provided with a slot A9 and a forwardly directed depending projection 51 formed in its foremost portion, the projection 51 being connected to the guide comb 47 by a spring 53. A shaft 55 fixed to the frame members 29 and 33 is disposed in engaged relationship with the slots 39 of the carry pawls, the springs 53 serving to bias the pawls in a counterclockwise direction on such shaft (as viewed in F16. 1). This counterclockwise bias of the pawls is limited by contact of their rearmost extremities against the rearmost surface of the guide comb. Each of the carry pawls 45 is also provided with a camming surface 57, a pair of vertical latching steps 59 and s1, and a leftwardly directed foot 63. in addition, a rearwardly extending projection 65 of each carry pawl is disposed in cooperating relationship with a floating shaft 67, the function of which is hereinafter described, and a stud 69 fixed to the left side surface thereof serves to prevent the carry pawl from being displaced from the guide comb when the projection 155 is activated by the floating shaft 67, such stud being blockably limited by the surface of the guide comb. The up permost latching step 61 of each carry pawl, in cooperation with the rearmost extremity of its associated longitudinal slot of the guide comb, serves to blockably limit said counterclockwise bias of the pawl on the shaft 55, when the pawl is disposed in its normal home position. The camming surface 57 of each carry pawl is disposed in cooperating relationship with a wide tooth of its corresponding gear wheel 25, the rotation of the gear wheel in either an add or subtract direction being accordingly effective to rotate the pawl a minimal clockwise distance on the shaft 55, such clockwise rotation serving to release the uppermost latching step 61 from the guide comb and to thereby release the pawl to the translating influence of its associated spring 53, the resulting translation of the carry pawl, in combination with its counterclockwise bias, serving to engage the lowermost latching step 59 with the extremity of its longitudinal slot and to accordingly position the foot 63 thereof in maximum spaced-apart relationship with the guide comb.

A plurality of carry sectors 71 are rotatably supported on a shaft 73 fixed to the frame members 21 and 23, as shown in FIGS. 1 through 6. Each of these carry sectors is provided with a toothed portion 75 operably disposed in a longitudinal slot of the guide comb 4'7 rightwardly adjacent a carry pawl jointly housed within such slot. Each carry sector is also provided with an enclosed cam portion 76 and with a yoked member 77 which is also rotatably supported by the shaft 73. Each carry sector is likewise provided with a rightwardly extending projection 79 which is cooperably associated with yet-to-bedescribed latching means and with the carry pawl of adjacent lower order. A generally U-shaped spring 81 having a plurality of coils wrapped around the shaft 73 is disposed in interposed relationship between each carry sector and its associated yoked member, the upwardly directed extremities of the spring 81 being disposed in contacting relationship with either side of the yoke formed by the yoked member 77 and in contacting relationship with either side of a movable shaft 83 when the calculating machine is in its normal home position, the arrangement being such that when the movable shaft 83 is activated into biasing contact with one extremity of the spring 81 the opposite extremity will exert a biasing force against the side of the yoke with which it is associated. The enclosed cam portion 76 of each carry sector is cammably associated with a shaft which is activatable downwardly by the full clockwise rotation of the cams 33 and 35 (FIGS. 9 and 10), to thereby restore the rotatably activated carry sectors to their respective home positions, as described in detail in a subsequent paragraph.

Associated with each order of the carry pawls 45, and with the rightwardly extending projection 79 of the adjacent higher order carry sector 71, is a pair of carry latches 37 and 89 which are rotatably supported by a shaft 91 fixed to the frame members 21 and 23. Each pair of carry latches 87 and 89 are laterally interlocked one with the other by means of interlaced yoked portions which are also rotatably supported by the shaft 91, and each pair is jointly housed within a slot formed in a guide comb 93 also fixed to the frame members 21 and 23. Each of the carry latches 87 and 59 is biased in a clockwise direction on the shaft 91 (as viewed in FIGS. 1 through 5) by means of a spring as connected to the carry latch and to a shaft 97 attached to the frame members 21 and 23. The carry all.

latch 87 of each pair is provided with a rear vertical step 99 and with a front vertical step 101, the former step serving to blockably limit the projection 71 of the adjacent higher order carry sector prior to the occurrence of an add carry, and the latter step serving to limit and to define the counterclockwise movement of the projection 79 and the carry sector 71 "luring a subtract carry. Each of the carry latches 89 is provided with a from vertical step 103 and with a rear vertical step 105, the former step serving to blockably limit the projection 79 of the adjacent higher order carry sector prior to the occurrence of a subtract carry, and the latter step serving to limit and to define the clockwise movement of the projection 79 and the carry sector 71 during an add carry. A shaft 107 forming a part of a multiple-shaft assembly 1119 (FIG. 11) is rotatable a minimal clockwise and counterclockwise distance in a manner hereinafter described, such clockwise rotation sewing to rotate the subtract carry latches $9 in a counterclockwise direction on the shaft 91 and such counterclockwise rotation serving to rotate the add carry latches 87 in a counterclockwise direction on said shaft, such counterclockwise positioning of the latches on the shaft 91 serving to condition the carry latches for both an add and a subtract carry during which the steps 103 and 99, respectively, are disengaged from the ofiset projections 79, and the steps and 101, respeclively, serve to limit the rotational carry movement of the carry sectors.

Each pair of carry latches 87 and 89 is cooperably aligned with the foot 63 of its associated carry pawl 45. The arrangement of the carry pawls in the guide comb 17 is such that the feet 63 of those carry pawls which are latched by means of their steps 59 will cammingly contact a surface 111 of the actively positioned carry latch $7 or 39, as the gear wheel rocker assembly and guide comb are disengageably rotated relative to the actuating sectors 24, to thereby release the corresponding carry sectors 71 to their add or subtract bias. During this disengageable rotation of the gear wheel rocker assembly, however, those carry pawls 45 which are latched by means of their steps 61 will fall short of contacting the surfaces 111 of their associated carry latches and will accordingly fail to release the next higher order carry sectors to their add or subtract bias.

As indicated in a previous section, the movable shaft 83 is activated into contact with one or the other of the extremities of the U-shaped springs 81, to thereby exert a clockwise add or counterclockwise subtract bias on the carry sectors 71, as shown in FIGS. 1 through 5. With reference to FIGS. 6 and 11, the shaft 83 is rotatably supported by a pair of links 113 fixed to a shaft 115 which is journaled within the frame members 21 and 23. A blank 117 is fixed to one extension of the shaft 115 and is outwardly disposed of the frame member 23. This blank provides rotational support for a pair of rollers 119 and 121, the former being identified as the add roller and the latter as the subtract roller. A central shaft 123 of the multiple-shaft as sembly 109 is also journaled within the frame members 21 and 23, and is provided with a bellcrank 125 fixed to one extremity of the shaft 123. The lower extremity of this bellcrank is connected to the operation control mechanism of the calculating machine and is rotated in a clockwise direction (as viewed in FIG. 11), when an add operation is indexed on the keyboard of the machine, and rotated in a counterclockwise direction when a subtract operation is indexed. The clockwise rotation of this bellcrank is effective to rotate the shaft 115 in a counterclockwise direction, by means of the roller 119 and the blank 117. With the shaft 115 so positioned, the movable shaft 83 is positioned in camming contact with the lower extremities of the U-shaped springs 81, to thereby exert a counterclockwise add bias to the carry sectors 71 (as viewed in F IG. 6). The counterclockwise rotation of the bellcrank 125 is effective to rotate the shaft 115 in a clockwise direction, by means of roller 121. With the shaft 115 so positioned, the movable shaft $3 is positioned in camming contact with the upper extremities of the U-shaped springs, to thereby exert a clockwise subtract bias on the carry sectors.

Since the bellcrank 125 is fixed to the central shaft i123 of the multiple-shaft assembly M9, the latter assembly is also rotated in a corresponding direction by means of the operation control mechanism of the calculating machine. The clockwise add rotation of the bellcrank 125 is accordingly also effective to rotate the shaft M7 in a clockwise direction, to thereby inactivate the vertical steps W3 of the subtract carry latches 23%, as previously described and as shown in FlG. 2. in like manner, the counterclockwise subtract rotation of the bellcrank E25 is effective to rotate the shaft N7 in a counterclockwise direction, to thereby inactivate the vertical steps 99 of the add carry latches $57 as shown in H6. 4.

Those carry pawls 45 which are released from their latching steps er during either an initial add or subtract carry are restored to their normal latched positions relative thereto during the succeeding machine operation whenthe gear wheels 25 are initially activated into engaged relationship with the actuating sectors 24, such restoration being accomplished by the camming action of the floating shaft 67 against the rearwardly extending projections 65 of such unlatched carry pawls. This floating shaft 67 is loosely fitted in a pair of vertical slots formed in the frame members 29 and 31 (FIG. 6) and is biased upwardly in such slots by means of a pair of hair springs which are not shown in the drawing. A slotted pivot blank 127 (FIGS. 9 and 110) is pivotally connected to each of the earns 33 and 35 and is provided with a notch 129 which exerts a momentary downward camming force on a corresponding extremity of the floating shaft 67 as the earns 33 and 35engageably activate the rollers 37 of the gear wheel rocker assembly. This momentary downward force is effective to activate the shaft 67 into contact with the rearwardly extending projections 65 of the unlatched carry pawls 45, to thereby restore the carry pawls to their normal latched positions defined by the latching steps 61. Subsequent to the momentary downward force applied to the floating shaft 67, the notches E29 are disengaged from the shaft by the action of the slotted pivot blanks 127, as the clockwise engageable activation of the cams 33 and 35 is continued. Release of the floating shaft 67, and its consequent upward resilient activation, must be effectuated during each machine operation before the gear wheels 25 are rotated either in an add or subtract direction by the actuating sectors 24.

Upon completion of a carry or tens transfer operation in either an add or subtract direction, the shaft 85 is also activated downwardly by the pivot blanks l27, to thereby restore those carry sectors 7l the rotational activation of which produced the carry. Such restoration also occurs during the succeeding machine operation as the gear wheels 25 are fully engaged with the actuating sectors 24. As indicated by H63. 9 and ill, the extremities of the shaft 555 are operably disposed in the slots of the pivot blanks 127, such slots serving to camrningly and slideably lower the shaft during the clockwise rotation of the cams 33 and 35. This lowering of the shaft 4% serves to cammingly contact the rearmost internal surfaces of the enclosed cam portions 76 of addably rotated carry sectors ll (as shown in FIG. 3), and to cammingly contact the frontmost internal surfaces of the enclosed cam portions of subtractively rotated carry sectors (as shown in H6. 5). A slotted bellcrank l3l is rotatably supported by either end of the shaft 73 (FIG. s), the slots thereof being cooperably associated with corresponding extremities of the shaft 85 to thereby position such shaft in closer proximity to the rearmost and frontmost surfaces of the enclosed cam portions during add and subtract carries, respectively, the shaft 555 accordingly being afforded a maximum carnming force against such internal surfaces. A pair of double-pronged bails 133 are rotatably supported by a shaft 135 (FlG. ill), the prongs of each bail being cooperably associated with the shaft i 37 and with a shaft i339 also forming a part of the multipleshaft assembly 169. A stud l3? fixed to each of these bails is disposed in a notch formed in its associated slotted bellcrank When the bellcrank H5 is rotated in a clockwise add direction by the operation control mechanism, the shafts iii? and 139 effectively rotate the double-pronged bails 133 a minimal clockwise distance on the shaft H35 (as viewed in FIG. ll), such minimal rotation serving to rotate the bellcranks 113i a minimal distance in a clockwise direction (as viewed in FlG. a on the shaft 733, such latter rotation serving to position the shaft in closer proximity to the rearmost internal surfaces of the enclosed cam portions 76 and to thereby maximize the camming action of the shaft thereagainst during its subsequent lowering. On the other hand, when the bellcrank is rotated in a counterclockwise substract direction by the operation control mechanism, the bellcranks l3l are rotated at minimal distance in a counterclockwise direction on the shaft 73, to thereby position the shaft $5 in closer proximity to the frontmost internal surfaces of the enclosed cam portions 76. By guidably positioning the shaft 85 in this fashion, the subsequent lowering thereof will be rendered particularly effective to restore the resiliently rotated carry sectors from both their add and subtract carried positions.

OPERATION OF THE TWO-DIRECTION CARRY MECHANISM As previously stated, the gear wheels 25 are rockably engaged with the actuating sectors 24 during add and subtract accumulating operations. This engagement is accomplished by the clockwise rotation of the driven shaft 39 and the earns 33 and 35 shown in FIGS. 9 and 10. During an add accumulating, the gear wheels are engaged with the actuating sectors after the latter have been differentially elevated to their indexed positions, the differential return movement of the sectors being effective to rotate the gear wheels a differential distance in a clockwise direction (as viewed in FIG. 6) according to the values indexed in the keyboard of the machine. During a subtract operation, on the other hand, the gear wheels are engaged with the actuating sectors prior to the differential elevation of the latter, such elevation being effective to rotate the gear wheels in a counterclockwise direction according to the values indexed. In both add and subtract operations, the gear wheels 25 and the gear wheel rocker assembly are disengageably activated by the springs 4i as the driven shaft 39 and the earns 33 and 35 are rotated in a counterclockwise direction (as viewed in FIGS. 9 and 10), such disengagement occurring respectively, either after or before the actuating sectors have been restored to their normal home positions.

The mode of operation of the preferred embodiment of the invention will be more clearly understood from the following description, wherein the sequence of occurrences during both add and subtract operations is set forth.

Upon indexing an add accumulation on the keyboard of the machine, the following sequence of occurrences applies:

1. The bellcrank 12S and the central shaft 123 are rotated in a clockwise direction (as viewed in FIG. 11) by the operation control mechanism. This rotation is effective to unlatch the vertical steps MP3 of the subtract carry latches 8% from the projections 79 of the carry sectors 7i, to position the shaft 35 in closer proximity to the rearmost internal surfaces of the enclosed cam portions 76, and to lower the movable shaft $33 into camming contact with the lower extremities of the U-shaped springs iii to thereby exert an add bias to the carry sectors 7i;

2. The actuating sectors 24 are differentially elevated to their indexed positions;

3. The gear wheels 2 are rockably engaged with the indexed actuating sectors, during which engagement the shaft 67 is lowered to restore previously unlatched carry pawls to their latched positions defined by the latching steps di and the shaft 85 is lowered to restore previously rotated carry sectors to their latched positions with the vertical steps 99 of the carry latches 37;

. T he actuating sectors 24 are difierentially lowered to their home positions and the gear wheels 25 are rotated a corresponding distance in an add direction, the wide teeth of those gear wheels whose capacity is exceeded thereby contacting the surfaces 57 of the corresponding carry pawls and releasing such pawls from their latching steps 61. The springs 53 of the released carry pawls thereupon translatably and rotatably activate the pawls into their latched positions defined by the latching steps 59;

5. The gear wheels 25 are rockably disengaged from the actuating sectors and the feet 63 of the translatably and rotatably activated carry pawls unlatchably contact the surfaces 111 of their corresponding carry latches 87;

6. Upon the unlatchable release of a given carry latch 87 from the projection 79 associated therewith, the adjacent higher order carry sector 71 is released to the add bias of its respective U-shaped spring and thereby rotated a one unit distance in a clockwise direction on the shaft 73 (as shown in FIG. 3). The adjacent higher order gear wheel with which the released carry sector cooperates is accordingly rotated a tooth distancein an add direction.

Upon indexing a subtract accumulation on the keyboard of the machine, the following sequence of occurrences applies:

1. The bellcrank 125 and the shaft 123 are rotated in a counterclockwise direction (as viewed in FIG. 11) by the operation control mechanism. This rotation is effective to unlatch the vertical steps 99 of the add carry latches 87 from the projections 79 of the carry sectors, to position the shaft 85 in closer proximity to the frontmost internal surfaces of the enclosed cam portions 76, and to raise the movable shaft 83 into camming contact with the upper extremities of the U-shaped springs 81 to thereby exert a subtract bias to the carry sectors 71;

2. The gear wheels 25 are rockably engaged with the actuating sectors, during which engagement those carry pawls which were previously unlatched from their steps 61 are restorably relatched relative thereto and those carry sectors which were previously resiliently rotated to their carried positions are restorably relatched with the vertical steps 103 of the carry latches 89;

3. The actuating sectors 24 are differentially elevated to their indexed positions and the gear wheels 25 are rotated a corresponding distance in a subtract direction, the wide teeth of those gear wheels whose capacity is exceeded thereby contacting the surfaces 57 of the corresponding carry pawls and releasing such pawls from their latching steps 61. The springs 53 of the released carry pawls thereupon translatably and rotatably activate the pawls into their latched positions defined by the latching steps 59;

. The gear wheels 25 are rockably disengaged from the actuating sectors and the feet 63 of the translatably and rotatably activated carry pawls unlatchably contact the surfaces 111 of their corresponding carry latches 89;

5. Upon the unlatchable release of a given carry latch 89, from the projection 79 associated therewith, the adjacent higher order carry sector is released to the subtract bias of its U-shaped spring and thereby rotated a one unit distance in a counterclockwise direction on the shaft 73 (as viewed in FIG. The adjacent higher order gear wheel with which the released carry sector cooperates is accordingly rotated a one tooth distance in a subtract direction.

While the invention has been shown and described in considerable detail, it will be understood that many variations thereof may be had without departing from the spirit and scope of the invention.

We claim:

1. A device for reversibly biasing an actuating member, said member having an actuating portion, a yoked portion, and a connecting web portion, said device comprising:

a. a mounted first shaft rotatably supporting said actuating portion and said yoked portion;

b. a U-shaped spring having a pair of parallel spaced-apart extremities and a plurality of coils loosely wrapped around said first shaft in interposed relationship with said actuating portion and said yoked portion, said spacedapart extremities assuming a straddling relationship with said web portion of said actuating portion;

c. a movably mounted second shaft interposed between said spaced-apart extremities of said U-shaped spring in contiguous relationship to said web portion;

means for selectively moving said second shaft into forcible contact with either of said extremities of said U- shaped spring, said forcible contact of said second shaft against one of said extremities causing the opposite extremity thereof to exert a corresponding biasing force against said web portion, said biasing force representing a selected potential motivating force for rotating said actuating member in a predetermined direction, said forcible contact of said second shaft against the opposite of said extremities causing a selected potential motivating force for rotating said actuating member in an opposing predetermined direction;

e. latchable means for limiting said actuating member against said selected biasing force and against said corresponding potential motivating force; and

f. means associated with said latchable means and effective for releasing said actuating member to said selected potential motivating force.

2. The reversible biasing device defined in claim 1 wherein said means for selectively moving said second shaft into forcible contact with said extremities of said U-shaped spring additionally comprises:

a. a rotatably mounted third shaft;

b. a pair of links fixed to said third shaft in spaced-apart relationship, said pair of links being rigidly connected to the ends of said second shaft; and

c. means for selectively rotating said third shaft a predetermined distance in opposing directions.

3. The reversible biasing device defined in claim 1 wherein said latchable means for limiting said actuating member against said selected biasing force additionally comprises:

a. an offset projection fixed to said actuating member; and

b. a biased latched member rotatably supported by a mounted fourth shaft, said latched member having a notch formed therein and being normally biased such that said notch is cooperably engaged with said offset projection of said actuating member.

4. The reversible biasing device defined in claim 3 wherein said means for releasing said actuating member to said selected potential motivating force additionally comprises: a pawllike latch release member timingly coordinated with the need for actuating said actuating member, said latch release member being effective to rotate said latch member against its said normal bias to thereby disengage its said notch from said offset projection of said actuating member.

5. The reversible biasing device defined in claim 3 and additionally comprising: means for restorably rotating said actuating member subsequent to the application of said selected potential motivating force thereto, said restorable rotation of said actuating member being effective to reengage said offset projection thereof with said notch formed in said biased latch member.

6. The reversible biasing device defined in claim 5 wherein said means for restorably rotating said actuating member additionally comprises:

a. an enclosed cam portion forming a part of said actuating member, said cam portion having a pair of spaced-apart internal camming surfaces;

b. a movably mounted fifth shaft disposed within said enclosed cam portion; and

c. means for moving said fifth shaft into camming contact with one or the other of said pair of internal camming surfaces of said enclosed cam portion.

7. in a calculating machine having drive means, operation control means, a plurality of actuating sectors, and at least one accumulator comprising a plurality of ordinally arranged accumulating gear wheels in association with a plurality of carry pawls and carry sectors, an improved tens transfer device effective for transferring both add and subtract carries into adjacent higher order accumulating gear wheels, said tens transfer device being characterized by:

a. carriage means supporting said accumulating gear wheels and said carry pawls, said means being responsive to said drive means and effective for rockably engaging and disengaging said gear wheels with and from said actuating sectors;

b. means responsive to the add or subtract rotation of said accumulating gear wheels and effective for resiliently activating said carry pawls;

c. reversible bias means responsive to said operation control means and effective for selectively biasing said plurality of carry sectors in opposing rotational directions; and

d. resilient means for latchably securing said plurality of carry sectors in said selected biased condition, said means for resiliently activating said carry pawls cooperating with said resilient latchable securing means in response to said disengageable rocking of said carriage means to release said carry sectors to the control of said selected bias, said latter bias thereby producing a one unit advancement of said accumulating gear wheels cooperably associated therewith in a rotational direction corresponding thereto, said one unit advancement occurring in accumulating gear wheels of adjacent higher order to said gear wheels producing said resilient activation of said carry pawls.

8. The improved tens transfer device defined in claim 7 wherein said carriage means for rockably engaging and disengaging said accumulating gear wheels with and from said actuating sectors comprises:

a. a first shaft rotatably supporting said plurality of accumulating gear wheels;

b. a pivotally mounted second shaft rockably responsive to said drive means of said calculating machine;

c. a pair of spaced-apart members fixed to said second shaft and rockably supporting said first shaft, each of said frame members having a vertical slot of predetermined length formed therein;

d. a third shaft fixed to said pair of frame members;

e. a fourth shaft floatingly disposed in said pair of slots formed in said pair of frame members, said fourth shaft being biased upwardly in said pair of slots; and

. a first guide comb fixed to said pair of frame members, said guide comb having a plurality of longitudinally disposed slots formed therein, each of said slots serving to rockably and translatably house a corresponding one of said carry pawls.

9. The tens transfer device defined in claim 8 wherein said means for resiliently activating said carry pawls comprises:

a. a slot formed in each of said carry pawls, said slot being cooperably associated with said third shaft;

b. a forwardly extending depending projection formed on each of said carry pawls in contiguous relationship with said slot; and

c. a spring connecting said depending projection of each of said carry pawls to said first guide comb, said spring serving to rotatably bias said carry pawl in a predetermined direction on said third shaft and to translatably bias said carry pawl in a predetermined direction in said corresponding longitudinal slot formed in said first guide comb.

10. The tens transfer device defined in claim 9 wherein said means for resiliently activating said carry pawls additionally comprises:

a. a rearwardly extending projection formed on each of said carry pawls adjacent said forwardly extending depending projection;

b. a first and a second latching step formed on each of said carry pawls, said latching steps being cooperably as sociated with the rearmost extremity of said corresponding longitudinal slot formed in said first guide comb;

c. a foot portion formed on the rearmost extremity of each of said carry pawls; and

d. a camming surface formed on each of said carry pawls in cooperating relationship with a corresponding one of said plurality of accumulating gear wheels and more particularly with a wide tooth formed thereon, the camming contact of said wide tooth on said camming surface of said carry pawl, during said rotation of said gear whel in either an add or subtract direction, serving to rotate said carry pawl on said third shaft against said bias of said spring and to thereby release said carry pawl from its normal latched position defined by said first latching step, said spring thereupon translating said carry pawl to a latched position defined by said second latching step, said foot member of said carry pawl being disposed in its maximum spaced-apart relationship with said first guide comb when said carry pawl is located in said latched position defined by said second latching step.

11. The tens transfer device defined in claim it? wherein said plurality of carry sectors are rotatably supported by a mounted fifth shaft, and wherein each of said carry sectors comprises an actuating portion and a yoked portion, said yoked portion being connected to said actuating portion by means of a web member, said actuating portion of each of said carry sectors additionally comprising:

a. a toothed portion cooperably associated with a corresponding one of said accumulating gear wheels;

b. an offset projection formed on one of the side surfaces thereof; and

c. an enclosed cam portion having a pair of spaced-apart internal camming surfaces.

E2. The tens transfer device defined in claim ll wherein said reversible bias means for selectively biasing said plurality of carry sectors in opposing rotational directions comprises:

a. a plurality of U-shaped springs, each of said springs having a pair of parallel spaced-apart extremities and a plurality of coils loosely wrapped around said fifth shaft in interposed relationship with said actuating portion and said yoked portion of a corresponding one of said carry sectors, said spaced-apart extremities assuming a straddling relationship with said connecting web member of said carry sector;

b. a movable sixth shaft interposed between said spacedapart extremities of said U-shaped springs in contiguous relationship to said web members of said carry sectors; and

c. means for selectively moving said sixth shaft into forcible contact with either of said extremities of said U-shaped springs, said forcible contact against corresponding ones of said extremities causing the opposite corresponding extremities thereof to exert a corresponding biasing force against said web members of said carry sectors, said biasing force representing a selected potential motivating force for rotating said associated accumulating gear wheels a one unit distance in a predetermined direction, said forcible contact of said sixth shaft against said opposite corresponding extremities of said U-shaped springs causing a biasing force representing a selected potential motivating force for rotating said associated gear wheels a one unit distance in a predetermined opposite direction.

13. The tens transfer device defined in claim 12 wherein said means for selectively moving said sixth shaft into forcible contact with either of said extremities of said U-shaped springs comprises:

a. a rotatably mounted seventh shaft having a blank member fixed to one end thereof, said blank member serving to rotatably support a first and a second roller;

b. a pair of links fixed to said seventh shaft in spaced-apart relationship, said pair of links being rigidly connected to the ends of said movable sixth shaft;

c. a rotatably mounted multiple-shaft assembly having a central supporting eighth shaft; and

d. a bellcranlr fixed to one end of said eighth shaft, said bellcrank being connected at one end thereof to said operation control means of said calculating machine, the opposite end thereof being disposed in cooperating relationllll ship with said first and said second rollers supported by said blank member of said seventh shaft, said bellcrank being bidirectionally rotatable a predetermined distance by said operation control means such that said opposite end thereof cammingly activates said first or said second roller, said camrning activation of said first roller serving to rotate said seventh shaft in such manner that said sixth shaft applies an add bias to said carry sectors through said U-shaped springs, and said camming activation of said second roller serving to rotate said seventh shaft in such manner that said sixth shaft applies a subtract bias to said ll-shaped springs and to said carry sectors.

M. The tens transfer device defined in claim 13 wherein said resilient means for latchabiy securing said carry sectors in said selected biased condition comprises:

a. a mounted ninth shaft; and

b. a plurality of pairs of carry latches rotatably supported by said ninth shaft, each of said pairs being guidably sup ported by a corresponding slot formed in a mounted second guide comb, and being also latchably associated with said offset projection of a corresponding one of said carry sectors, each of said pairs of carry latches being normally biased into activated latched relationship with said corresponding offset projections, and each latch of said pair being selectively unlatchable from said corresponding offset projection by the rotation of a th shaft of said multiple-shaft assembly, each latch of said pairs of latches having a surface disposed in cooperable relationship with said foot portion of its corresponding carry pawl, said foot portions of said carry pawis which have been resiliently activated to their latched positions defined by their said second latching steps being effective, during said disengageable rocking of said carriage means, to cammingly release said activatably latched carry latches from said corresponding offset projections of said carry sectors, and to thereby release said carry sectors to their said selected potential motivating force.

15. The tens transfer device defined in claim M wherein each latch of said pairs of carry latches additionally comprises:

a. a pair of vertical steps disposed in cooperable relationship with the said offset projection of said corresponding carry sector; and

b. a depending projection disposed in cooperating relationship with said lOth shaft of said multiple-shaft assembly, said carry latch being spring biased in such manner as to straddlingly engage said pair of vertical steps with said offset projection of said corresponding carry sector, a first of said pair of steps serving to blockingly secure said carry sector against its said selected bias and a second of said pair of steps serving to limit said rotational movement of said carry sector when released to said selected potential motivating force, said first and said second steps of each pair of carry latches being oppositely arranged relative to one another.,

M. The tens transfer device defined in claim 15 wherein said rotation of said 10th shaft to thereby selectively unlatch one of each pair of carry latches from said offset projections of said corresponding carry sectors is accomplished by means of: said bidirectional rotation of said bellcrank by said operation control means of said calculating machine, said bidirectional rotation serving to correspondingly rotate said central eighth shaft of said multiple-shaft assembly of which said 16th shaft forms a part, said rotation of said bellcrank in such manner as to carnrningly activate said first roller serving to unlatchably activate said carry latches comprising said vertical steps for bloclcably securing said carry sectors against said subtract bias, and said rotation of said bellcrank in such manner as to cammingly activate said second roller serving to unlatchably activate said carry latches comprising said vertical steps for blockably securing said carry sectors against said add bias, said unlatchable activation of said carry latches being sufficient to disable said vertical blocking steps without disabling said vertical steps for limiting said rotational movement of said can; sectors when released to said selected motivating force. 1 The tens transfer device defined in claim 14 wherein:

a. said carry pawls which have been rotatabiy and translatably activated to their said latched positions defined by their said second latching steps are restored to their said latched positions defined by their said first latching steps by said drive means of said calculating machine in cooperation with said carriage means during said rockable engagement of said accumulating gear wheels with said actuating sectors, said restoration being accomplished by the camming contact of said fourth shaft against said rearwardly extending projections of said translatably activated carry pawls; and

b. said carry sectors which have been rotatably activated by said selected potential motivating force are restored to their said latched relationship with their said corresponding pairs of latchably biased carry latches by said drive means of said calculating machine during said rockable engagement of said accumulating gear wheels with said actuating sectors, said restoration being accomplished by the camming action of an 1 lth shaft associated with said drive means against said internal camming surfaces of said enclosed cam portions of said carry sectors. 

1. A device for reversibly biasing an actuating member, said member having an actuating portion, a yoked portion, and a connecting web portion, said device comprising: a. a mounted first shaft rotatably supporting said actuating portion and said yoked portion; b. a U-shaped spring having a pair of parallel spaced-apart extremities and a plurality of coils loosely wrapped around said first shaft in interposed relationship with said actuating portion and said yoked portion, said spaced-apart extremities assuming a straddling relationship with said web portion of said actuating portion; c. a movably mounted second shaft interposed between said spaced-apart extremities of said U-shaped spring in contiguous relationship to said web portion; d. means for selectively moving said second shaft into forcible contact with either of said extremities of said U-shaped spring, said forcible contact of said second shaft against one of said extremities causing the opposite extremity thereof to exert a corresponding biasing force against said web portion, said biasing force representing a selected potential motivating force for rotating said actuating member in a predetermined direction, said forcible contact of said second shaft against the opposite of said extremities causing a selected potential motivating force for rotating said actuating member in an opposing predetermined direction; e. latchable means for limiting said actuating member against said selected biasing force and against said corresponding potential motivating force; and f. means associated with said latchable means and effective for releasing said actuating member to said selected potential motivating force.
 2. The reversible biasing device defined in claim 1 wherein said means for selectively moving said second shaft into forcible contact with said extremities of said U-shaped spring additionally comprises: a. a rotatably mounted third shaft; b. a pair of links fixed to said third shaft in spaced-apart relationship, said pair of links being rigidly connected to the ends of said second shaft; and c. means for selectively rotating said third shaft a predetermined distance in opposing directions.
 3. The reversible biasing device defined in claim 1 wherein said latchable means for limiting said actuating member against said selected biasing force additionally comprises: a. an offset projection fixed to said actuating member; and b. a biased latched member rotatably supported by a mounted fourth shaft, said latched member having a notch formed therein and being normally biased such that said notch is cooperably engaged with said offset projection of said actuating member.
 4. The reversible biasing device defined in claim 3 wherein said means for releasing said actuating member to said selected potential motivating force additionally comprises: a pawllike latch release member timingly coordinated with the need for actuating said actuating member, said latch release member being effective to rotate said latch member against its said normal bias to thereby disengage its said notch from said offset projection of said actuating member.
 5. The reversible biasing device defined in claim 3 and additionally comprising: means for restorably rotating said actuating member subsequent to the application of said selected potential motivating force thereto, said restorable rotation of said actuating member being effective to reengage said offset projection thereof with said notch formed in said biased latch member.
 6. The reversible biasing device defined in claim 5 wherein said means for restorably rotating said actuating member additionally comprises: a. an enclosed cam portion forming a part of said actuating member, said cam portion having a pair of spaced-apart internal camming surfaces; b. a movably mounted fifth shaft disposed within said enclosed cam portion; and c. means for moving said fifth shaft into camming contact with one or the other of said pair of internal camming surfaces of said enclosed cam portion.
 7. In a calculating machine having drive means, operation control means, a plurality of actuating sectors, and at least one accumulator comprising a plurality of ordinally arranged accumulating gear wheels in association with a plurality of carry pawls and carry sectors, an improved tens transfer device effective for transferring both add and subtract carries into adjacent higher order accumulating gear wheels, said tens transfer device being characterized by: a. carriage means supporting said accumulating gear wheels and said carry pawls, said means being responsive to said drive means and effective for rockably engaging and disengaging said gear wheels with and from said actuating sectors; b. means responsive to the add or subtract rotation of said accumulating gear wheels and effective for resiliently activating said carry pawls; c. reversible bias means responsive to said operation control means and effective for selectively biasing said plurality of carry sectors in opposing rotational directions; and d. resilient means for latchably securing said plurality of carry sectors in said selected biased condition, said means for resiliently activating said carry pawls cooperating with said resilient latchable securing means in response to said disengageable rocking of said carriage means to release said carry sectors to the control of said selected bias, said latter bias thereby producing a one unit advancement of said accumulating gear wheels cooperably associated therewith in a rotational direction corresponding thereto, said one unit advancement occurring in accumulating gear wheels of adjacent higher order to said gear wheels producing said resilient activation of said carry pawls.
 8. The improved tens transfer device defined in claim 7 wherein said carriage means for rockably engaging and disengaging said accumulating gear wheels with and from said acTuating sectors comprises: a. a first shaft rotatably supporting said plurality of accumulating gear wheels; b. a pivotally mounted second shaft rockably responsive to said drive means of said calculating machine; c. a pair of spaced-apart members fixed to said second shaft and rockably supporting said first shaft, each of said frame members having a vertical slot of predetermined length formed therein; d. a third shaft fixed to said pair of frame members; e. a fourth shaft floatingly disposed in said pair of slots formed in said pair of frame members, said fourth shaft being biased upwardly in said pair of slots; and f. a first guide comb fixed to said pair of frame members, said guide comb having a plurality of longitudinally disposed slots formed therein, each of said slots serving to rockably and translatably house a corresponding one of said carry pawls.
 9. The tens transfer device defined in claim 8 wherein said means for resiliently activating said carry pawls comprises: a. a slot formed in each of said carry pawls, said slot being cooperably associated with said third shaft; b. a forwardly extending depending projection formed on each of said carry pawls in contiguous relationship with said slot; and c. a spring connecting said depending projection of each of said carry pawls to said first guide comb, said spring serving to rotatably bias said carry pawl in a predetermined direction on said third shaft and to translatably bias said carry pawl in a predetermined direction in said corresponding longitudinal slot formed in said first guide comb.
 10. The tens transfer device defined in claim 9 wherein said means for resiliently activating said carry pawls additionally comprises: a. a rearwardly extending projection formed on each of said carry pawls adjacent said forwardly extending depending projection; b. a first and a second latching step formed on each of said carry pawls, said latching steps being cooperably associated with the rearmost extremity of said corresponding longitudinal slot formed in said first guide comb; c. a foot portion formed on the rearmost extremity of each of said carry pawls; and d. a camming surface formed on each of said carry pawls in cooperating relationship with a corresponding one of said plurality of accumulating gear wheels and more particularly with a wide tooth formed thereon, the camming contact of said wide tooth on said camming surface of said carry pawl, during said rotation of said gear wheel in either an add or subtract direction, serving to rotate said carry pawl on said third shaft against said bias of said spring and to thereby release said carry pawl from its normal latched position defined by said first latching step, said spring thereupon translating said carry pawl to a latched position defined by said second latching step, said foot member of said carry pawl being disposed in its maximum spaced-apart relationship with said first guide comb when said carry pawl is located in said latched position defined by said second latching step.
 11. The tens transfer device defined in claim 10 wherein said plurality of carry sectors are rotatably supported by a mounted fifth shaft, and wherein each of said carry sectors comprises an actuating portion and a yoked portion, said yoked portion being connected to said actuating portion by means of a web member, said actuating portion of each of said carry sectors additionally comprising: a. a toothed portion cooperably associated with a corresponding one of said accumulating gear wheels; b. an offset projection formed on one of the side surfaces thereof; and c. an enclosed cam portion having a pair of spaced-apart internal camming surfaces.
 12. The tens transfer device defined in claim 11 wherein said reversible bias means for selectively biasing said plurality of carry sectors in opposing rotational directions comprises: a. a plurality of U-shaped springs, each of said springs having A pair of parallel spaced-apart extremities and a plurality of coils loosely wrapped around said fifth shaft in interposed relationship with said actuating portion and said yoked portion of a corresponding one of said carry sectors, said spaced-apart extremities assuming a straddling relationship with said connecting web member of said carry sector; b. a movable sixth shaft interposed between said spaced-apart extremities of said U-shaped springs in contiguous relationship to said web members of said carry sectors; and c. means for selectively moving said sixth shaft into forcible contact with either of said extremities of said U-shaped springs, said forcible contact against corresponding ones of said extremities causing the opposite corresponding extremities thereof to exert a corresponding biasing force against said web members of said carry sectors, said biasing force representing a selected potential motivating force for rotating said associated accumulating gear wheels a one unit distance in a predetermined direction, said forcible contact of said sixth shaft against said opposite corresponding extremities of said U-shaped springs causing a biasing force representing a selected potential motivating force for rotating said associated gear wheels a one unit distance in a predetermined opposite direction.
 13. The tens transfer device defined in claim 12 wherein said means for selectively moving said sixth shaft into forcible contact with either of said extremities of said U-shaped springs comprises: a. a rotatably mounted seventh shaft having a blank member fixed to one end thereof, said blank member serving to rotatably support a first and a second roller; b. a pair of links fixed to said seventh shaft in spaced-apart relationship, said pair of links being rigidly connected to the ends of said movable sixth shaft; c. a rotatably mounted multiple-shaft assembly having a central supporting eighth shaft; and d. a bellcrank fixed to one end of said eighth shaft, said bellcrank being connected at one end thereof to said operation control means of said calculating machine, the opposite end thereof being disposed in cooperating relationship with said first and said second rollers supported by said blank member of said seventh shaft, said bellcrank being bidirectionally rotatable a predetermined distance by said operation control means such that said opposite end thereof cammingly activates said first or said second roller, said camming activation of said first roller serving to rotate said seventh shaft in such manner that said sixth shaft applies an add bias to said carry sectors through said U-shaped springs, and said camming activation of said second roller serving to rotate said seventh shaft in such manner that said sixth shaft applies a subtract bias to said U-shaped springs and to said carry sectors.
 14. The tens transfer device defined in claim 13 wherein said resilient means for latchably securing said carry sectors in said selected biased condition comprises: a. a mounted ninth shaft; and b. a plurality of pairs of carry latches rotatably supported by said ninth shaft, each of said pairs being guidably supported by a corresponding slot formed in a mounted second guide comb, and being also latchably associated with said offset projection of a corresponding one of said carry sectors, each of said pairs of carry latches being normally biased into activated latched relationship with said corresponding offset projections, and each latch of said pair being selectively unlatchable from said corresponding offset projection by the rotation of a 10th shaft of said multiple-shaft assembly, each latch of said pairs of latches having a surface disposed in cooperable relationship with said foot portion of its corresponding carry pawl, said foot portions of said carry pawls which have been resiliently activated to their latched positions defined by their said second latching steps being effective, during said disengageable rockIng of said carriage means, to cammingly release said activatably latched carry latches from said corresponding offset projections of said carry sectors, and to thereby release said carry sectors to their said selected potential motivating force.
 15. The tens transfer device defined in claim 14 wherein each latch of said pairs of carry latches additionally comprises: a. a pair of vertical steps disposed in cooperable relationship with the said offset projection of said corresponding carry sector; and b. a depending projection disposed in cooperating relationship with said 10th shaft of said multiple-shaft assembly, said carry latch being spring biased in such manner as to straddlingly engage said pair of vertical steps with said offset projection of said corresponding carry sector, a first of said pair of steps serving to blockingly secure said carry sector against its said selected bias and a second of said pair of steps serving to limit said rotational movement of said carry sector when released to said selected potential motivating force, said first and said second steps of each pair of carry latches being oppositely arranged relative to one another.
 16. The tens transfer device defined in claim 15 wherein said rotation of said 10th shaft to thereby selectively unlatch one of each pair of carry latches from said offset projections of said corresponding carry sectors is accomplished by means of: said bidirectional rotation of said bellcrank by said operation control means of said calculating machine, said bidirectional rotation serving to correspondingly rotate said central eighth shaft of said multiple-shaft assembly of which said 10th shaft forms a part, said rotation of said bellcrank in such manner as to cammingly activate said first roller serving to unlatchably activate said carry latches comprising said vertical steps for blockably securing said carry sectors against said subtract bias, and said rotation of said bellcrank in such manner as to cammingly activate said second roller serving to unlatchably activate said carry latches comprising said vertical steps for blockably securing said carry sectors against said add bias, said unlatchable activation of said carry latches being sufficient to disable said vertical blocking steps without disabling said vertical steps for limiting said rotational movement of said carry sectors when released to said selected motivating force.
 17. The tens transfer device defined in claim 14 wherein: a. said carry pawls which have been rotatably and translatably activated to their said latched positions defined by their said second latching steps are restored to their said latched positions defined by their said first latching steps by said drive means of said calculating machine in cooperation with said carriage means during said rockable engagement of said accumulating gear wheels with said actuating sectors, said restoration being accomplished by the camming contact of said fourth shaft against said rearwardly extending projections of said translatably activated carry pawls; and b. said carry sectors which have been rotatably activated by said selected potential motivating force are restored to their said latched relationship with their said corresponding pairs of latchably biased carry latches by said drive means of said calculating machine during said rockable engagement of said accumulating gear wheels with said actuating sectors, said restoration being accomplished by the camming action of an 11th shaft associated with said drive means against said internal camming surfaces of said enclosed cam portions of said carry sectors. 